#define _CRT_SECURE_NO_WARNINGS	



bool isUnique(char* astr)
{
    int len = strlen(astr);
    for (int i = 0; i < len; i++)
    {
        for (int k = 0; k < i; k++)
        {
            if (astr[k] == astr[i])
                return false;
        }
        for (int x = i + 1; x < len; x++)
        {
            if (astr[x] == astr[i])
                return false;
        }
    }
    return true;
}